<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>手写 jQuery</title>
</head>
<body>
<div class="test">
    你好1
    <div class="child">child1</div>
    <div class="child">child2</div>
    <div class="child">child3</div>
</div>
<div class="test">
    你好2
    <div class="child">child2</div>
    <div class="child">child3</div>
</div>
<div class="test">
    你好3
    <div class="child">child3</div>
</div>
<div id="container">
    container
</div>
<script src="jquery.js"></script>
<script src="main.js"></script>
</body>
</html>